AX 2012 to D365 Data Upgrade: Incremental sync did not complete successfully

 Well, we are finally doing an upgrade to D365!  It's exciting to get into this chapter of our ERP.

While attempting a data upgrade to D365, I ran into the following error when running the data upgrade 'execute' portion of the script:

AOS database sync failed. Microsoft.Dynamics.AX.Framework.Database.TableSyncException: Incremental sync did not complete successfully. Error: ArgumentException:tableId.

   at Microsoft.Dynamics.AX.Framework.Database.Tools.LegacyCodepath.<>c.<RunPartialTableSync>b__23_1(Tuple`2 result)

   at Microsoft.Dynamics.AX.Framework.Database.Tools.LegacyCodepath.ExecuteWithinAOS(SyncOptions syncOptions, String sqlConnectionString, IMetadataProvider metadataProvider, Func`1 func, Action`1 errorHandler)

   at Microsoft.Dynamics.AX.Framework.Database.Tools.LegacyCodepath.RunPartialTableSync(SyncOptions options, String sqlConnectionString, IMetadataProvider metadataProvider)

   at Microsoft.Dynamics.AX.Framework.Database.Tools.SyncEngine.PartialTableViewSync()

   at Microsoft.Dynamics.AX.Framework.Database.Tools.SyncEngine.PartialSync()

   at Microsoft.Dynamics.AX.Framework.Database.Tools.SyncEngine.RunSync()

   at Microsoft.Dynamics.AX.Framework.Database.Tools.SyncEngine.Run(String metadataDirectory, String sqlConnectionString, SyncOptions options)

Failed operation step '/DataUpgrade/PreReqs/PartialDbSync'

Process 'K:\AosService\PackagesLocalDirectory\bin\SyncEngine.exe' failed with exit code -1; see error logs for details.

   at Microsoft.Dynamics.Servicing.DataUpgrade.Operations.Operation.RunProcess(String fileName, ArgumentsBuilder args)

   at Microsoft.Dynamics.Servicing.DataUpgrade.Operations.OperationStep.Execute()

I'm not sure, at this point, what the issue is.  Still researching...